.top{
    height: 70px;
    background: #242424;
    box-sizing: border-box;
    border-bottom: 1px solid #000;
}

.top .top_bar{
    display: flex;
    justify-content: space-between;
    width: 1100px;
    height: 70px;
    line-height: 70px;
    margin: 0 auto;
}

.top_bar .bar-left{
    display: flex;
}

.top_bar .bar-left .logo a{
    display: block;
    width: 157px;
    height: 70px;
    margin-right: 20px;
    text-indent: -9999px;
    background-image: url("../images/topbar_sprite.png");
}

.top_bar .bar-left .list{
    display: flex;
}

.top_bar .bar-left .list .item{
    display: block;
    color: #fff;
    font-size: 14px;
    padding: 0 20px;
    position: relative;
}

.top_bar .bar-left .list .item:hover{
    background: #000000;
}


.top_bar .bar-left .list .item.active{
    background: #000000;
}

.top_bar .bar-left .list .item.active::after{
    content: "";
    position: absolute;
    width: 12px;
    height: 7px;
    bottom: -1px;
    left: 0;
    right: 0;
    margin: 0 auto;
    background: url("../images/topbar_sprite.png") -226px 0;
}

.top_bar .bar-right{
    display: flex;

}

.top_bar .bar-right .m_search{
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin-right: 15px;
}

.top_bar .bar-right .m_search input{
    width: 158px;
    height: 32px;
    border-radius: 30px;
    padding-left: 15px;
    font-size: 12px;
}

.top_bar .bar-right .m_auth a{
    width: 90px;
    height: 32px;
    border-radius: 30px;
    border: 1px solid #4F4F4F;
    padding: 6px 15px;
    color: #ccc;
    margin-right: 15px;
}

.top_bar .bar-right .m_auth a:hover{
    border: 1px solid #fff;
    color: #fff;
}

.top_bar .bar-right .m_login a{
    font-size: 12px;
    color: #787878;
}

.top_bar .bar-right .m_login a:hover{
    border-bottom: 1px solid #787878;
}